Senior Mobile Engineer (Swift and/or Kotlin)

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SeniorZdalnie·WarszawaFull-time

#461298·Dodano 3 dni temu·6

Źródło: Exerizon

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Tech Stack / Keywords

Swift Kotlin SwiftUIUIKitJetpack Composeserver-driven UIREST GraphQL OAuth2OWASP MASVS

Podsumowanie oferty

Build and modernise native mobile apps for clients in banking, insurance and healthcare. Own app architecture and deliver iOS with Swift and/or Android with Kotlin, including server-driven UI and secure integrations.

Wymagania

6+ years of native mobile development, including 3+ years in Swift for iOS and/or Kotlin for Android; at least two apps shipped to production and maintained through multiple releases.
Deep knowledge of the relevant platform: SwiftUI, UIKit, Swift Concurrency or Combine, and Xcode for iOS; Jetpack Compose, Kotlin Coroutines and Flow, Android Jetpack, and Gradle for Android; working understanding of the other platform.
Hands-on experience with mobile security in regulated environments, including OAuth2/OIDC, strong customer authentication flows, secure storage, certificate pinning, OWASP MASVS, and closing penetration-test findings.
Solid testing and CI/CD practice, including XCTest or JUnit, UI and snapshot tests, automated pipelines, code signing, store submission and release management.
Ability to own architecture decisions and safely refactor large legacy codebases, with measurable improvements in build time, crash rate or release cadence.
Experience designing or integrating a server-driven UI framework, including component schemas, a client renderer, schema versioning and A/B-tested layouts; understanding of its trade-offs for offline use, performance and accessibility.
Daily use of coding agents and copilots, understanding their failure modes, and reviewing AI-generated code to the same standard as one’s own.
Fluent API integration skills with REST, GraphQL and OpenAPI contracts, and experience working with backend teams on API design.
Experience delivering apps in banking, insurance, fintech or healthcare, including PII handling and regulatory constraints such as PSD2, SCA and GDPR.
Clear communication with non-engineers, explaining trade-offs to product owners and estimating honestly.
Full professional fluency in Polish and English.

Nice to have:

Mobile payments integration with Apple Pay, Google Pay or BLIK.
Accessibility auditing experience with VoiceOver or TalkBack.
Tech lead or team lead experience on a client-facing engagement.
Experience building team AI tooling, such as custom agents, MCP servers, or codebase-specific skills and prompts.
Experience shipping an SDUI-based app at scale or contributing to an open-source SDUI framework.

Obowiązki

Design and build native apps with Swift (SwiftUI, UIKit) and/or Kotlin (Jetpack Compose), including new features, legacy-code modernisation and justified rewrites.
Own platform architecture, including modularisation, MVVM, Clean Architecture, TCA, dependency injection, offline-first design and data-sync strategies.
Build and evolve server-driven UI (SDUI): design component schemas with backend teams using JSON or Protobuf, own the client-side renderer, and handle schema versioning, backward compatibility and fallbacks.
Use coding agents and copilots such as Claude Code, Cursor and GitHub Copilot for implementation, refactoring, test generation and code review; verify their output and help bring the practice to the team.
Integrate backend services using REST, GraphQL and gRPC, and secure apps with OAuth2/OIDC, biometrics, Keychain, Keystore, certificate pinning, root and jailbreak detection, and OWASP MASVS.
Set engineering standards for code review, unit, UI and snapshot tests, CI/CD, signing, and App Store and Google Play releases with phased rollouts; use Fastlane, GitHub Actions, Azure DevOps or Bitrise.
Build in observability and product quality through crash reporting, analytics, feature flags, and performance and startup-time budgets.
Deliver accessibility to WCAG 2.2 and EN 301 549 standards, and implement localisation.
Work with client product owners, designers, backend engineers and QA; estimate, plan and demo work to stakeholders.
Mentor mid-level engineers, raise standards across Exerizon’s mobile practice, and support proposals and pre-sales demos.

Benefity

Real ownership of the apps you build and direct contact with client product owners.
Annual training and certification budget.

Dofinansowanie szkoleń

Exerizon

15 aktywnych ofert

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